class AddColumnComputer < ActiveRecord::Migration
  def self.up
    add_column :computers, :ram_used, :integer, :default => 0
    add_column :computers, :cpu_used, :integer, :default => 0
    add_column :computers, :hard_drive_used, :integer, :default => 0
    end
  
  def self.down
    remove_column :computers, ram_used
    remove_column :computers, cpu_used
    remove_column :computers, hard_drive_used
  end
end